[PNW Fireguy]

We use a triple canister system from RV Walter Filter Company. Those Camco filter barely do an ok job of filtering large sediment. The cost difference from two stage to three stage whole house was not that much at all. 1/2 micron sediment, carbon and a metal trap. You can even use the blue Camco as the 1st filter to grab large sediment down to 5 micron. It will prolong the life of your 1/2 micron 1st stage. You can buy all the filter media on Amazon going forward to save a few bucks, however the value add RVWaterFilterStore.com provides was worth the couple of bucks over Amazon or the big box stores. To me.